The Dallas billionaire filed requests for records in December under the Freedom of Information Act. That was a month after the SEC sued Cuban, accusing him of selling shares of an Internet search engine company after receiving confidential information about a private offering.
Cuban's lawsuit claims the SEC improperly rejected some requests, didn't respond quickly enough to appeals of rejections and failed to conduct adequate searches for some records.
Cuban provided a copy of his lawsuit to The Associated Press after it was reported by The Dallas Morning News. An SEC spokesman declined comment.